#include <stdio.h>

void swap(int num1, int num2);

int main(void)
{
    int a, b;

    printf("Please input two numbers: ");
    scanf(" %d %d", &a, &b);

    swap(a, b);
    printf("%t%d%t%d", a, b);
}

void swap(int num1, int num2)
{
    int temp;

    temp = num1;
    num1 = num2;
    num2 = temp;
}

